Journal-bearing



(No Model.) B. J DOWNS,

Journal. Bearing.

No'. 236,560. 7 Patented. Jan. 11,1881;

'NI'IE Srres AIENT tries- BENJAMIN J. DOWNS, OF CAMBRIDGE, MASSACHUSETTS, ASSIGNOR TO GRAN- ULAR METAL COMPANY, OF NASHUA, NEW HAMPSHIRE.

JOURNAL-BEARING.

SPECIFICATION forming part of Letters Patent No. 236,560, dated January 11, 1881.

Application filed October 23, 12580. (No model.)

To all whom it may concern:

Be it known that I, BENJAMIN J. DowNs, a citizen of the United States, residing at Cambridge, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in J ournal-Bearin gs; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art 130 which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification. I

My invention relates particularly to an improvement in the shells of journal-bearings; and its object is to furnish a simple and strong shell for the support of a composition bearing of anti-friction metal cast therein, and adapted for use with journals of appropriate size without side or end guards for the composition.

My invention consists in a shell or backing for a composition bearing, said shell having a solid or unperforated back and internal ribs or flanges occupying spaces in the composition body and running transverse to and partly around the axis of the journal; also, in such transversely stiffened shell having open or unguarded ends to permit the composition to 0 be coextensive with the shell; also, in a shell of such construction, in combination with a body or filling of anti-friction metal.

The accompanying drawings illustrate my invention and contrast it with the old form of 5 shell, Figure 1 being a vertical longitudinal section on the line or, through the shell and its composition body. Fig. 2 is a perspective view of the inverted shell before filling, and

Fig. 3 illustrates the ordinary shell.

In the drawings, A is my improved shell, by preference curved internally, in general conformity with the curvature of the journal with which it is to be used, but proportioned so as to leave space for a sufficient thickness of the 5 alloy which forms the bearing.

B B are ribs formed upon the inner surface of the shell and extending transversely and toward the axis of the journal. These ribs serve to stiffen and strengthen the shell and 5c aid in retaining the bearing 0 in position.

They are connected centrally by a longitudinal spine,D.

The anti-friction filling O, constituting the bearing surface, is formed by casting within the shell a suitable body of metallic alloy, 5 5 preferably that described and claimed in my Letters PatentNo. 221,400, dated November 11, 1879, which compound possesses in a marked degree the qualities essential to a journalbearing subjected to great pressure and wear. 6o Theshell is made of gun-metal, or of some other strong and tenacious metal, to which the alloy will unite when cast within it, and having a fusing-point considerably above that of the alloy, so that the latter when worn out 6 may be melted off and recast upon the former.

It is customary in casting anti-friction bearin gs to cast the shell with one or more perforations in its back, in order to pour through such perforations the molten alloy, and. also to form upon the shell at each end and side a barrier or flange, serving to prevent the escape of the molten metal when poured through said perforations into the space between the shell and an arbor representing the axle or journal. This construction is illustrated in Fig. 3, where the perforations are numbered 1 2 and the barriers 3 4 5 6. With my improvements I omit said perforations and barriers, since the former weaken the shell and Waste all the alloy that fills them, and the latter speedily come into contact with the journal when the alloy has worn down slightly. In the case of bearings for railroad-cars the button on the end of the axle wears against the end barrier, 3, and heats the axle inj uriously, while the flange 4 soon cuts against the face of the journal withlike effect, and the bearing must be replaced. My improved shells, having no end flanges, as shown in Figs. 1 and 2, are 0 not subject to such objections, and the bearings used therewith are serviceable until entirely worn out,

I claim as of my invention- 1. An improved shell for journal-bearings 5 having a solid unperforated back, stiffened internally by transverse ribs, which are adapted to be covered and embraced by the metallic compound forming the bearing, substantially as set forth. 10o

2. An improved shell for journal-bearings having internal ribs transverse to the axis at points between the ends of the shell, and made open or without barriers at the ends, for the purposes set forth.

3. The combination, with a shell having a solid back transverse internal ribs, and open ends, as described, of a continuous or homogeneous anti-friction metallic bearing secured in position within said shell, substantially as 10 and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

BENJAMIN J. DOWNS.

Witnesses:

J AS. W. CARTWRIGHT, A. H. SPENCER. 

